This is how i understand the information:
The PCIe 2.0's per-lane throughput is 500 MB/s. This means a 4-lane PCI connector (x4) can support throughput up to 2 GB/s aggregate.
All the best,
hmmmm, but for the x16 and x8 port there is written:
• PCI Express 2.0 x16: one PCI Express 2.0 x16 connector supporting simultaneous
transfer speeds up to 8 GB/s of peak bandwidth per direction and up to 16 GB/s
• PCI Express 2.0 x8: one PCI Express 2.0 x 8 connector supporting simultaneous
transfer speeds up to 4 GB/s of peak bandwidth per direction and up to 8 GB/s
and this is conform to the pci-e 2.0 definition...